Firm Mattress Topper Firm mattress toppers make your bed feel more firm. Most range from 1 to 4 inches thick. The thickness will determine how much the topper changes the feeling of your bed. Toppers can be made of best memory foam mattress topper foam feathers, polyfoam, or polyfoam or they can be made from latex, latex-polyfoam, or feathers. Many are also ...
